Polymer-based candle-shaped microneedle electrodes for electroencephalography on hairy skin

Miyako Arai, Yuta Kudo, Norihisa Miki

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

In this paper, we report on the optimization of the shape of dry microneedle electrodes for electroencephalography (EEG) on hairy locations and compare the electrodes we developed with conventional wet electrodes. We propose the use of SU-8-based candle-shaped microneedle electrodes (CMEs), which have pillars of 1.0mm height and 0.4mm diameter with a gap of 0.43mm between pillars. Microneedles are formed on the top of the pillars. The shape was determined by how well the pillars can avoid hairs and support the microneedles to penetrate through the stratum corneum. The skin-electrode contact impedances of the fabricated CMEs were found to be higher and less stable than those of conventional wet electrodes. However, the CMEs successfully acquired signals with qualities as good as those of conventional wet electrodes. Given the usability of the CMEs, which do not require skin preparation or gel, they are promising alternatives to conventional wet electrodes.

Original languageEnglish
Article number06GP16
JournalJapanese Journal of Applied Physics
Volume55
Issue number6
DOIs
Publication statusPublished - 2016 Jun 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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